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By now you should be seeing the bigger picture with Google Earth, but you might not want to do all the exploration on your own. Finding the Pyramids of Giza, Red Square in Moscow, or the Viaduc de Millau in France (the world's tallest car-accessible bridge), is time-consuming. Sometimes low-resolution images make it impossible. The Google Earth/Keyhole BBS is a great first stop to mine for placemarks and links to other geo activities. Members have posted tens of thousands of saved places from their wanderings; written overlays for the geocaching at www.geocaching.com, the official Global Positioning System (GPS) cache hunt site; and provided placemarks with links to other geographical imaging sites, such as the World Wide Panorama (geoimages.berkeley.edu/wwp/index.html). Another rich site for placemarks is Google Sightseeing at www.googlesightseeing.com, a Web site initially set up to post interesting finds using Google Maps satellite images, such as possible UFOs in Florida.

When you find a link that seems interesting, click on it and select Open to import the KMZ or KML file into Google Earth. It will load in your Temporary Places, waiting for you to view it, and then save to My Places. If you want to be a good neighbor, share your placemarks with others. The Google Earth/Keyhole BBS has an excellent tutorial about how to post your links and some advice on how to participate on the forums.

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